No no... not the two women known as Selina Kyle... they are a "Cookie Cutter Counterparts" i.e. both Catwomen are near identical. And not up for consideration today. Instead, we review their male contemporaries who were each a johnny-come-lately in the supervillain set. Thomas Blake was world-renowned for his fierce hunting skills, and like other hunters in fiction he set his eye on that most dangerous of prey, man. Specifically, a Dark Knight who himself had previously faced mostly intellectual or solely gimmick-clad foes, but not a physical match.
Donning the uniform of Earth-One's Catman, Blake alleged that the specialized mask he had inherited in one such expedition had granted him the power of nine lives. On his second outing he fell in love with Batwoman, herself still enraptured with Bruce Wayne's alter ego. Batman bested Catman thrice in the silver age, then later after an outing versus the Freedom Fighters Catman had a rematch with his foe and once more fell short of the mark of victory.
Another Catman existed on Earth-Two in the form of Silky Cernak. Himself a frequent henchmen of his world's Catwoman while she was a criminal, after she retired Cernak pursued her after having served years in prison. Blackmailing the now Selina Wayne back into a life in crime so as not to sully her family's name by a photoshopped picture that allegedly showed Kyle of murdering an individual, this led to a confrontation with Selina's husband in his Batman alter ego. Ultimately, it was Silky as Catman who accidentally shot his former boss, leading to the death of Mrs. Wayne. After evading the law following this encounter, Silky was cornered by Batman and Catwoman's daughter the Huntress.
Another Cat-man also appeared after Silky's career as a henchman had been finished yet prior to his reappearance decades later. And this man likewise tried to seduce Selina back into a life of crime following her retirement. This was the King of Cats, the long-lost and here-to-fore unmentioned brother of the then retired Catwoman of Earth-Two. Karl Kyle wanted to ride the coattails of his sister's previous success, not fully comprehending she usually escaped more due to Batman's affection for her than for her outmatching him in their duels, and became a crime king of Gotham City for a brief period. After Catwoman saved his life and showed him the folly of his ways, he retired and upon parole was able to attend his sister's wedding to Bruce Wayne. On Earth-One, Karl Kyle did not pursue a costumed career to mirror that of his more sinister sibling, however another paralleled the King of Cat's attempted ascension to mafia monarchy of the Masked Manhunter's metropolis of Gotham. This person was a Queen of the Cats.
This was on the occasion when Thomas Blake found himself fixated with Batwoman and convinced her into donning a costume to become his queen and the second version of Cat-woman. However, this was merely a ploy to locating Blake's hideout and leading the Dynamic Duo there in order to help her capture Catman and his henchmen. Nevertheless, Batwoman and Catman still had mixed emotions, as there was chemistry between the two even though Thomas' incessant gambling habit and longing to pursue a criminal career kept him on the wrong side of the law.
Whether Thomas Blake or Silky Cernak... whether Kathy Kane or Karl Kyle, or their counterparts... were significant influences in the lives of the Batmen... it remains true that the original Catwomen were the true standard-bearers of ferocious feline foes for the Caped Crusaders on twin worlds.